Re: 1955 Fastwin 15 HP 15014 parts breakdown Home › Forum › Ask A Member › 1955 Fastwin 15 HP 15014 parts breakdown › Re: 1955 Fastwin 15 HP 15014 parts breakdown frankrUS Member - 1 Year (includes $3 online payment fee)Replies: 6715Topics: 51 March 19, 2018 at 8:20 pm #72763 12hp Buccaneer is similar but not same as its Johnson and Evinrude cousins. 12hp is 2-1/4" bore, 15hp is 2-3/8" bore, 18-20hp is 2-1/2" bore. In addition, the 12hp has silver plated aluminum connecting rods, J/E has roller bearings.